Combined rear vision mirror and clock



0er, z, 1934.

w. LA'HODNY i COMBINED REAR VISION MIRROR AND CLOCK 4 Sheets-Sheet -1 Filed Nov. 1'7 1930 gwntoc 0st 2, 1934. w LA HODNY 1,975,158 .l

COMBINED REAR VISION MIRROR AND CLOCK Filed NOV. 17. 1930 4 Sheets-Sheet 2 C) G Z5/g.

oct. 2, l1934.

W. LA HODNY COMBINED REAR VISION MIRROR AND CLOCK Filed NOV. 17. 1930 4 Sheets-Sheet 3 Oct. 2, 1934. w LA HoDNY I COMBINED REAR VISION MIRROR AND. CLOCK Filed Nov. 1'7 1950 4 Sheets-Sheet 4 lil/wr* Patented Oct. 2, 1934 Urr vs'rA'rEs PATENT Fei CONIBINED REAR VISION lVIIRROR CLOCK AND Appiicatien Nevember 17,1930, serial No. 496,121

30 Claims.

This invention relates to a combined mirror and instrument and although this invention is more particularly intended for combining a rear view mirror with a time piece, such as a watch or clock, it is equally useful in combining a mirror with a barometer, thermostat, compass, oil gage, viscosity gage,`or other instrument usually emn ployed on automobiles and similar installations.

It is the object of this invention to provide a i combined mirror and instrument of this character which permits of fastening together these devices by means which are strong and durable in construction, reliable and efficient in operation, and capable of being produced-economically.

In the accompanying drawings:

Figure 1 is a front elevation of a rear view mirror of oblong rectangular form combined with a watch by means of one form of my invention.

Figure 2 is a top View of the same, partly in section, the sectional part being taken on line 2-2, Fig. 1. I .Y

Figure 3 is an end vieW,.partly in section, of the construction shown in Figs. 1 and 2.

Figure 4 is a front view of a rear view mirror in which a watch is fastened thereto by a modified form of fastening in accordance with my invention. Y

Figure 5 is a vertical cross section of the sameV taken on line 5 5, Fig. 1.

Figure 6 is a front view of a rear View mirror showing still another form of my improved means for fastening a watch to the same.

'Figure 7 is a top View of the construction shown in Fig. 6. l

Figure S is a'vertical cross section taken on line 8 8, Fig. 7.

Figure 9 is a vertical longitudinal section taken on line 9-9, Fig. 8.

Figure 10 is a perspective view of the cylindrical wall of the watch casing used in the construction shown in Figs. 6 9.

Figure l1 is a similar view of the clamping ring used in the construction shown inFigs.. 6-9.

Figure 12 is a similar view of the spacing ring used in the construction shown in Figs. 6-9.

Figure 13 is a frontview of still another form of combined mirror and watch embodying my invention.

Figure 14.- is a fragmentary top View of the same.

Figure 15 is a vertical cross section of the same, on anenlarged scale, taken on line 1515,Y Fig.- 14.

Figure 16 is a vertical longitudinal section taken on line 16-15, Fig. 15.

Figure 17 is a front view of a combined mirror and watch containing my invention but showing a (Cl. 45m-97) different form of supporting bracket from that shown in Figs. 1, 2, 4 and 13.

Figure 18 is an end elevation of the same, partly in section.

1n the following description similar characters 60 of reference indicate like parts in the several figures of the drawings.

, Although the accompanying drawings show this invention in connection with a watch or clock it is to be understood thatany other time piece, or any other kind of instrument such as va thermometer, compass, oil gage, viscosity gage, barometer and so forth may be used instead and it is therefore to be understood that in the following description referenceto a watch or clock is merely for convenienceland that this term isintended to include any kind of instrument which may be used in connection with a mirror.

Referring to the construction shown in Figs. 1, 2.and3, the numeral 20 represents a clear glass 75 plate which in this instance is made of oblong rectangular formv and provided on its rear side with a reflecting coating 11, such as quick silver, for the purpose of converting this glass plate into a mirror which is adapted to be used for rear vision purposes on automobiles and the like.

Y This mirror may be mounted upon the wind# shield of an automobile or other available support by means of a bracket which in the present case comprises upper and lower hooks or jaws 13, 14 85 engaging with the upper and lower edges of the glass plate adjacent to the center thereof and having their opposing innerv ends constructed to form a socket 15, and a hanger 12 adapted to be secured to the frame of the windshield and provided at its 'lower end with a ball 16 which is frictionally held in the socket 15, as shown in Figs. 1 and 2. l

Adjacent to one end of the mirror the reecting coating is omitted or removed so as to form an area 17 on this glass plate which is transparent, this area in the present case being of cird cular form. In rear of this transparent area of the mirror plate is arranged an instrument cf any v suitable character which is adapted to be observed by the` driver or other persons in the car,r such for example as a circular time-piece 18 which may be either constructed in the form of a watch or small clock and mounted on the mirror plate in rear of thetransparent area thereof so that the face of the clock is visible by the driver or other persons from the iront side of the mirror and thereby enable the time of day to be ascertained whenever desired.

The present invention relates primarily to the 11 means of mounting this clock on the mirror plate and the forni of this invention, as shown in Figs. l, 2 and 3 is constructed as follows:

The numeral 19 represents an attaching plate made of any suitable transparent material such for example as glass, Celluloid and the like, and this attaching plate may also beef any desired contour to suit the instrument with which the saine is intended to cooperate but in the present case is oi circular form and of a diameter equal to the circular transparent area of the mirror plate. IThis attaching plate may be secured to the mirror plate in rear oi the transparent area thereof in any suitable manner, but this is 'preferaoly accomplished by means of a lm 11.0 of transparent cement which is applied to the rear side of the transparent area of the mirror plate and the front side oi' the transparent attaching plate so as to securely unite the same and still permit oi observing the iront side ci the clock which is arranged in rear of this transparent area.

In the construction shown in 2, the attaching plate has its outer or peripheral edge bevelled forwardly, as shown at 2l, so that this edge is undercut relative to the rear side of this attaching plate vand forms an annular outwardly opening groove between the edge of the attaching plate andthe adjacent rear side of the mirror plate. The clock or time piece is held with the marginal part of the bezel 22 on its front side in engagement with the rear side ci the attaching plate 19 by means oi a clampinCr ring 23 which surrounds the periphery oirthe attaching plate and the clock case, and is secured to these members by splitting this clamping ring at one point, as shown at 24, and connecting two ears or lugs 25 at the ends of the split parts of this ring 'by means of a clamping bolt 26. Vlin order to prevent this clamping ring from slipping oir the attaching plate 19 and also to prevent the clock from slipping out of the rear side of this ring, the latter is curved transversely so as to iorm a concave transverse clamping face 27 on its inner side whereby the iront edge of this clamping ring forms a rearwardly facing internal shoulder which engages with the forwardly facing undercut shoulder 2l on the attaching plate, Iand the rea-r edge or" the clamping ring forms -a forwardly 'facing internal shoulder which engages with the marginal part oi the rear side oi the clock case and holds the same in an assembled position relative to the attaching plate and the mirror plate.

The operating stem 28 Vof the time piece is preferably so arranged that the saine projects from the time piece horizontally and laterally therefrom a sufficient distance beyond the right hand edge ci the mirror plate, sc that the will be conveniently accessible for winding and setting the clock or watch. in order to `permit this voperating stem 28 to assume this position and still permit the` clock to be engaged bythe clamping ring 23 for holding the saniein place, the split partei this clamping ring is arranged on the inner part of the same and the dianietrically opposite part of this ring which is arranged adjacent to the right hand edge oi the mirror plate is provided with a notch 29 which receives the neck or" the winding stem28, as shown Figs. 2 and 3.

The means for thus mounting the time piece or I other instrument on the mirror plate are wholly independent and in no wise connected with the bracket which supports the mirror plate on a windshield or the like, excepting that the clock mounting and the mirror mounting are connected with the saine mirror plate, but otherwise there is no direct physical connection between the instrument mounting and the mirror mounting, and these mountings perform their functions wholly independently of each other so that adjustment, inspection and repairs of one can be eiected without disturbing the other.

'By making the attaching .plate xof .a material separate from the mirror plate a laminated transparent structure is provided for the transparent area through which the tace of the clock or other instrument is visible which gives the impression ci bringing the face of the clock, watch cr other instrument nearer to the front surface of the mirror plate than would otherwise he 'the case. This is .due to the fact that four reflecting surtaces are provided by the mirror plaie and lthe attaching plate, viz: the front and rear sides of the mirror pla-te and the front and rear sides `of the attaching plate through which the face of the instrument is visible from the front oi 'the mirror plate.

This eiect of making the tace .of the watch, clock `or other instrument appear .to be ycloser to the fron-t side ofV the vmirror plate :is iurther enhanced by constructing the rear side oi .the transparent Iattaching plate of convex form, as shown for example on the rear side 30 .oi ythe'attaching plate 3l, shown in Fig. 5, which concave face produces the additional eliect .oi an ordinary dished glass crystal usually `placed over .the iront side of a watch or clock.

In the modified torni .of :this invention shown in Figs. 4 and 5 the transparent attaching plate 31 has its 4inarginfor edge provided with a icy-lindrical face 32 and the time piece '33 is held with y its bezel 34 on lthe marginal part v.oi iront side against .the marginal part of the rear side of the transparent Aattaching plate 31 by Vinea-ns of a cup-shaped casing, the annular wall 35 ci which surrounds `the periphery .32 ,of the; attaching plate 3l and the periphery of the watch or instrument, this :wall .35 'being provided with a rear head 36 which bears against the rear side or" the Watch :or clock through the medium of an interposed .elastic packing 37 which is made of lielt orsimilar material. This casing is detachably connected with the mirror plate -by means :of upper :and lower vclips 38, 138, `.eachlof which is provided at its front end with a claw,

jaw or 'hook .39. and engaging over the ,correspending horizontal edge of the respective Inir- I end bears against the outer side of the respectivel clip, as .shown in Fig. 5.

In the embodiment of my invention, as shown in Figs. 6, l7., 8, 9,l 10, ll and 12 the means for mounting an instrument on Ya .mirror-plate 2G having an attaching plate 19 similar to :that shown in Fig. 2 is constructed as `follows:

In these iigures the form of rny invention employed for mounting 'a clock -or vwatch in rearoi the transparent `area of the mirror plate and the Q attaching plate is'rnore particularly intended for use in connection with a clock which is provided with a cylindrical housing 4S having an annular bead'49 -at its front end and a laterally projecting winding vand setting .stem 45, which latter forv employing an annular bezel 59 which engages convenience will be referred toas an operating stem.

ln this modied forni ci my inventionan annular clamping ring is employed which surrounds the edge ci the attaching plate 19 and the periphery o the clock or time piece, and is provided at its iront edge with an internal beveled coupling rim 47` which forros a rearwardly facing shoulder engaging the forwardly facing undercut edge 2l of the attaching plate,y as shown in Fig. and thereby prevents the clarnping ring which 'forrnspart of the housing or casing the clock or other instrument from being pulled rearwardly away from the attaching plate and rnirror plate. in order to permit this clamping ring to thus engage the attaching plate, this ring is split at one point in its periphery, preierably the right hand side thereof, as shown at 48 in Figs. 9 and l1, thereby permitting this clamping ring to be sprung apart sufficiently to engage its iront rim 47 with the undercut edge of the attaching plate and also to again contract for establishing a connection between this ring a--d the attaching plate.

The casing 43 of the clocl; or watch is held with face a sufficient distance in rear of the attaching plate so as to provide an intervening spa-ce 5l therebetween in which the clock hands 44 are free to rotate, this space being formed by its periph ry with the inside of the clamping ring 45 and bears with its iront side against the attaching plate and with its rear side against an inwardly projecting flange 52 arranged on the inner side of the clamping ring 4G so that the iront side of this flange 52 is transversely in line with the iront side of the clock casing and is engaged simultaneously therewith by the rear side of the bezel 5c, as shown in Fig. 8. rihis bezel j is introduced into the clamping ring by springing the latter open suiciently for this purpose.

rElie clock casing 43 is held with the front side or" its bead 49 in engagement with the bezel 50 by` oi" a spacing ring 53 which engages with the rear part of the inner side of the clamping ring 45 and bears with its front end against the rear of the bead 49 on the clock case, while its end bears against an `internal forwardly iff. shoulder 54 fornied on therear part o'f inner side of the clamping ring, as shown in c. in order to permit the spacing ring 53 to be thus engaged with the clamping ring 46 and clock case and also removed therefrom, this spacinJ ring is split at one point of its circumas shown at 55, in Figs. 9 and 12.J thereby this spacing 1ing to be sprung the extent for this purpose in assembling disrnenhering these parte.

ln order to pe it of conveniently contracting the spacing when ls desired to remove the ser-ie the clock and clamping ring, `the rear locking ring is provided. atone'or in its periphery with a notch 55 to receive the edge o a screw 'er or other i1--.nunient for prying this spacing ring out oi the clamping ring whenever it is desired to dismantle the The rear end of the clamp-ing ring is preferably fed by a head 57 which is constructed or .U s'neeL metal and is of die d form and de f connected with an annular under ont on the exterior of the rear end o' claro-.ping ring by engagement of an annular rirn 5.1 on edge of this head with this seat, as shown in ig. 8.

.L the The clamping ring is held in its contracted position, so that the coupling rini 47 at its front end engages firmly with the undercut face 2l oi the attaching plate and the ilange 52 of the clamping ring is held tightly in engagement with the bead 49 of the clock casing, by means or a continuous annular band 01 casing ring 60 which surrounds the front part of the clamping ring when the latter is in its contracted condition and is held tightly with its front side or end against ti Ve bach of the mirror plate by means oi a locking ring 61 having a screw connection 62 with Vthe exterior of the clamping ring at the rear end thereof and bearing against the rear end oi the casing ring, as shown in Fig. 9. f

When the several parts oi the clock and rear viert7 mirror are assembled in the manner shown in Fig. 8 the clock is supported reliably on the mirror plate so that none of the parts can become loose while this device is mounted. on an automobile and subiected to the jarring action ci the same.

For the purpose of winding and setting the time piece enclosed in the casing 43 in the construction shown in Figs. 6 to 9 the works of the watch are provided with a laterally projecting winding and setting stern 45 which is adapted to project through the slit between the ends or" the split spacing ring, an enlargement or notch 64 at the front end of the slit 48 in the clamping ring, and a notch 65 in the rear edge orn the retaining or casing ring thereby enabling these parts to be assembled and dismeinbered wihout intertering with each other and still permitting the watch or cloclr to be wound and set from the esm terior of the time piece and its mounting whenever this is required.

In the forni oi my invention shown in Figs. 13, 14, 15 and 16 the attaching plate 191 is ina-de in the form of a frame instead of a dislr, as shown in Fig. 9, and the inner edge of this traine shaped attaching plate is provided with an undercut edge Zil of bevelled or angular forro which is engaged by a correspondingly bevelled rirn 471 arranged on the iront end of the clamping ring 461. In this case the clamping ring also split in the manner similar to the clamping ring own in Fig. 11, but the same is contracted for the purpose of disengaging the coupling rirn 47?. frorn the undercut seat 211 and this clamping ring is expanded for engaging the coupling 471 with the respective undercut edge 211 or" the attaching plate 191.

In this modied form annular bezel 50 is interposed between the rear side of the mirror plate 20 and the front side of the bead 49 on the clock-case, and the spacing ring 53 is arranged within the clamping ring and bears at its front end against the rear side of the bead 49 while its rear end bears against internal forwardly facing shoulder 54 on the ciano.

1n other respects these means ior holding theclocl; on the mirror plate are substantially ike those shown in the construction illustrated in Figs. 6 to 12. l l

It is to be understood that this invention is applicable to mirror plates of various forms and not limited to the oblong rectangular forni uhewn in Figs. l, 4, 6 and 13. For example, the may be of substantially triangular forni with rounded corners, as shown at 201 in Fig. '2'.

lf Vdesired the features of this invention may be embodied in a rnrror and clock mounting device in which the means for attaching the clock tothe mirror plate are connected directly with the bracket which is adapted to support the clock and mirror on a Windshield or other support, but is not connected independently with the mirror plate. Such an example is shown in Fig. 18 in which the lower side of the casing ring 60 is provided with a 1oall socket 151 which receives a hall i62 arranged at the lower end of a hanger 163 adapted to be secured to the windshield of an automobile or other support.

En the manufacture of this combined mirror and clock any suitable cement may be used for connecting lthe laminations rconsisting of the mirror plate and the attaching plate. The reflecting coating to the mirror plate may be applied thereto either before or after the attaching plate is connected therewith.

Although the attaching plate is shown in the several examples as consisting either of a circular dislr or a frame having a circular opening, the external edge of the disk o1' the internal edge of the frame shaped attaching plate may be of anyother desired form, for example hexagonal, octagonal or square with rounded corners.

When it is desired to taire out the clock or Watch from the mounting this can be done by springing off the snap cover or head 5'? at the rear end of the clamping ring and then springing the spacing or retaining ring suilicientiy to disengage the saine from the clock case and clamping ring after which the clock, watch or other instrument may be removed for inspection or repairs, and all the parts may be again replaced in the reverse order just described, without disturbing the other parts whereby the clock is mounted on the mirror plate.

If desired the attaching plate may be made of various colors, materials or designs in order to add a decorative eiect to the combined rear vision mirror and instrument holder as a whole.

I claim as my invention:

l. en arti-cie of the character describe-d comprising a transparent panel, a transparent attaching plate secured to the rear side of said panel, an instrument anged in rear of transparent plate, and means for holding instrument in place relative to said panel and transparent plate.

2, An article the character described, coinprising a transparent panel, an attaching plate secured to the rear side of said panel, and having an undercut edge, an instrument arranged in rear of said panel, and means for holding said instrument in position relative to said panel including an element engaging with the undercut edge of said attaching plate.

3. An article of the character described, cornprising a transparent panel, a transparent attach 1g plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position rele`J to said attaching plate including an element engaging the undercut edge of said attaching plate.

e. An ai 'cle of the character described, coinprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a clamping ring provided at its front end with an internal rim engaging the undercut edge of said attaching plate.

5. An article of the character described, comprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrumentin position relative to said attaching plate including a split clamping ring surrounding said instrument and provided at its front end with an internal rim engaging the undercut edge of said attaching plate.

6. An article of the character described, comprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a split clamping ring surrounding said instrument and provided at its front end with an internal rim engaging the undercut edge of said attaching plate, said instrument having an external annular bead and said clamping ring having an internal forwardly facing shoulder at its rear end, a bezel arranged within the front part of said clamping ring between said internal rim thereof and the bead of said instrument, and a spacing ring arranged within the rear part of said clamping ring between the rear internal shoulder thereof and the rear side of the bead on said instrument.

7. An article of the character described, cornpri ng a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a split clamping ring surrounding said instrument and provided at its front end with an internal rim engaging the undercut edge of said attaching plate, said instrument having an external annular bead and said clamping ring having an internal forwardly facing shoulder at its rear end, a bezel arranged within the front part of said clamping ring between said internal rim thereof and the bead of said instrument, and a split spacing ring arranged within said clamping ring between said rear shoulder thereof and the rear side of said bead.

8. An article of the character described, comprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a split clamping ring surrounding said instrument and provided at its front end with an internal rim engaging the undercut edge of said attaching plate, said instrument having an external annular bead and said clamping ring having an internal forwardly facing shoulder at its rear end, a bezel arranged within the front part of said clamping ring between said internal rim thereof and the bead of said instrument, and a split spacing ring arranged within said clamping ring between said rear shoulder thereof and the rear side of said bead, and having a notch in its edge for the reception of a tool to remove the spacing ring from the clamping ring.

9. An article of the character described, cornprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a split clamping ring surrounding said instrument and provided at its front end with an internal rim engagingrthe undercut edgeof said attaching plate, said instrument having an external bead and said clamping ring beingv provided between its ends with an internal ange which has its iront side in line with the front side of said bead andalso has an internal forwardly projecting shoulder at its Arearend, a bezel arranged within the front part of said clamping ring between said rim and the vrfront sides of said ange and bead, and a spacing ring arranged within the rear part of said clamping ring between the forwardly facingl rearshoulder thereof and the rear side of said beadof` the instrument.

10. An article of the character described, comprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear o said attaching plate, and means for holding said instrument in position relative to said attachingplate including a clamping ring provided at its front end with an internal rim engaging the undercut edge of said attaching plate, and a head detachably connected with the rear end of said clamping ring.

l1. An article of the character described, cornprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear o said attaching plate, and means for holding said'instrument in position relative to said attaching plateV including a clamping ring provided at its'iront end with an internal rim engaging the undercut edge of said attaching plate, and a head of springV material having an internal rim adapted to engage over an external rim on the rear'end of said clamping ring. l 'f l2. An article of the character described, cornprising a transparent panel, a transparent attaching plate secured to the rear side of said panel' and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a clamping ring provided at its front end with an internal rim engaging the undercut edge of said attaching plate and provided at its rear edge with a notch for the reception of a stem on said instrument.

13. An article ci the character described, comprising a transparent panel, a transparent attaching plate secured to the rear side oi said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a split clamping ring surrounding said instrument and provided at its front end with an internal rim engaging the undercut edge of said attaching plate, and a casing ring surrounding said clamping ring.

le. An article of the character described, cornprising a transparent panel, a transparent attaching plate secured to the rear side of said panel and provided with an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in position relative to said attaching plate including a split clamping ring surrounding said instrument and provided at its front end with an internal rim engaging the undercut edge of said attaching plate, a casing ring surrounding said clamping ring, and a locking ring arranged on the rear end of said clamping ring and engaging the rear end of said casing ring. I

15. An article ofthe characterdescribed, comprising a transparent panel, transparent attaching plate secured to the rear ci said paneland provided with an undercut edge, instrument arranged in rear of said attaching plate, and means for holding said instrumen. in position relative to said attaching plate including a split clamping ring surrounding said instrument and previdedat its iront end with internal rim engaging the undercut edge or" said attaching plate, a casing ring surrounding said clamping ring and engaging therear side of said panel, and a locking ring having a screw connection with the rear end of said clamping ring and engaging with the rear end of said casing ring.

16. An article of the characterdescribed, comprising a transparent panel, an'attaching plate secured to the rear side of panel and having an undercut edge, an instrument arranged in rear of said panel and means for holding said instrument in place including a split clamping ring surrounding said instrument and having a rim at its iront end which engages said undercut edge, and a casing ring surroundingsaid lclamping ring.

l?. An article ci the character described comprising a transparent panel, an attaching plate secured to the rear side of said panel and having an 'internal undercut edge, an instrument arranged in rear of said panel, and means for holding said instrument in place including an attaching ring surrounding said instrument and provided at its iront end with an external rim engaging with theinternal undercut edge of said attaching plate.

.18. An article of the character described comprising a transparent panel, an attaching plate secured to the rear side of said panel and having an internal undercut edge, an` instrument arranged in rear of said panel, and means for holding said instrument in place including an attaching ring surrounding said instrument and provided at its front end with an external rim engaging with the internal undercut edge ot said attaching plate, and a casing ring surrounding said clamping ring and engaging its front end with the rear side of said panel, and a locking ring having a screw connection with the clamping ring and engaging with the rear end or said casing ring.

19. An article of the character described, comprising a transparent panel, an attaching plate secured to the rear side of said panel and having an undercut edge, an instrument arranged in rear of said panel, and means for holding said instrument in place including a split clamping ring surrounding said instrument and having a rim at its front end which engages said undercut edge, and a casing'ring surrounding said clamping ring, saidr casing ring and clamping ring being provided aty their rear edges with notches for a stem on said instrument.

2G. An instrument of the character described, comprising a transparent panel, a transparent plate arranged in rear of said panel, an instrunient arranged in rear of said transparent plate, and means for holding said instrument in place including a casing member enclosing said instrument and engaging with the edge of said transparent plate.

21. An article of the character described, comprising a transparent panel, a transparent attaching plate attached to the rear of said panel and having an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in place including a split retaining ring surrounding said instrument and engaging said undercut edge, and a screw connecting the ends or" said split' ring.

22. An article of the character described', comprising a transparent panel, a transparent attaching plate attached tothe rear of said panel and having an undercut edge, an instrument arranged in rear of said attaching plate, and means for holding said instrument in place including a split retaining ring which has a concave inner side in cross section and engages its front end with the undercut edge of said attaching plate while its rear end overhangs the rear side of said instrument, anda screw' connecting the ends of said split retaining ring.

23. Improved means for' mounting a dial instrument comprising a transparent member having a cavity in one portion of a face thereof, said cavity having a maximum depth lessthan the thickness of said member, a dial instrument and means engaging said instrument and extending into said cavity, and anchored Within said cavity directly to the Wall thereof, whereby said instrument will be supported from said member solely by its anchorage Within said cavity.

24. Improved means for mounting a dial instrument comprising a transparent imperforate member having a Wall which extends from, and is approximately normal to the interior area of one face of said member and bounds an area of said member, a dial instrument and means secured directly to the face of said Wall and engaging said instrument to confine the latter to said member, for observation through said area of said member.

25. Improved means for mounting a dial instrument comprising a transparent member having upon a part of its rear face an internal chamber openingthrough said rear face and closed by the front face of said member, a dial instrument disposed at the rear face of said member and visible through and covered by a portion of said member, and a member engaging said instrument and clamped to a wall of said chamber to confine said instrument to said member.

26. Improved means for mounting a dial instrument comprising a transparent member hav- Y ing vupon'a part of its rear face an internal chamber opening through said rearV face and closed by the front face of said member, a dial instrument disposed at the rear face of said. memberi 27. Improved means for mounting a dial instrument comprising an imperforate glass plate, said plate having a Wall extending from an interior section of said surface, in a direction approximately normal thereto, a dial instrument, and a split shell mounting said instrument in a position to be visible through and covered by said platepand at the split partially telescoping with, and removably clamped to, said Wall by a change in diameter of the split part.V

28. Improved means for mounting a dial instrument comprising a transparent plate, a dial instrument disposed at the rear of said plate in a position with its dial visible through said plate, said plate also having a shoulder on the interior area of its rear face, means confining said instrument in said position and fitted to said shoulder, and means for drawing said mounting means into tight clamping engagement With said shoulder, whereby said instrument will be conned to and supported from said plate.

29. Improved means for mounting a dial instrument comprising a transparent plate having an undercut wall on its rear face, a dial instrument disposed adjacent the rear face of said plate in a position to be visible therethrough, and means anchored to said Wall by the undercut portion thereof, and confining said instrument to said plate.

3'0. Improved means for mounting a dial instrument comprising an imperforate, transparent vso plate of frangiblematerial and having, in an ini terior area of one face thereof a shoulder in said face, a dial instrument disposed at said one face of said plate so as to be visible through said interior area of said plate, and means tted. and anchoredto'the shoulder of said plate in the interior area of its rear face for confining said instrument to said plate.

WILLIAM LA noDNv.Y 

